Clearing device for air ducts in the lip of casting pots



sept.. 28, 1943...-

A. zUNzER CLEARING DEVICE FOR AIR DUCYTS IN THE LIP 0F CASTING POTSFiled April 24, 1941 /f/en for:

Patented Sept. 28, 1943 L CLEARING vDEVICE FOR Ani DUors'iN4 THE f 4LicorCASTING.ro'rs`I` AdolfZunzer, Waldshut, Hochrhein, Germany; vestedin the VAlien PropertyfCustodian i Application April 24,1941, SeriaiNo.390,296 j In Germany April 29, 1940 imams. (c1. 904125. f v

As .is knowmthelip of casting pots `vof typ" setting machines isprovided at its operating,"`

surface VWith a number of holes between which When typej settingmachines are in use," these air ducts` reduire clearing vfrom. time totime, a work which there are hollowed out air ducts.

hitherto was mostly done by the' operator of the type-setting machinewith a hammer and a chisel. This recutting ofthe air ducts causedconsiderable difficulties, especially 'because ythe accuracy andefliciency'of this work entirely depended upon theskill of the operatorand the suitability of the tools used for this purpose. Accordingly, asevery expert knows, this work very often causes' considerabledisturbances, particularly if it is done by anunskilled operator. Thus,4by one-sided recutting, the casting lip Was often displaced, andthereresultedlateral eleva` tions of material which made it necessary to lethe lip. All these uncertainties in clearing the air ducts required alengthy adapting of the casting lip to the mould. These diiliculties arefurther increased by the fact that, as already mentioned, skilledoperators are mostly not available for this purpose in printing offices.

As a result of the diiculties mentioned above, the problem solved by thepresent 'invention consists in making the work of clearing the air ductsat the lip of casting pots of type-setting machines during operationindependent of said circumstances, that is, in developing a device whichwill enable even an inexperienced and unskilled operator to do theclearing in a perfect manner.

AA constructional example of the subject of the invention is illustratedin the accompanying drawing, in which- Fig. 1 shows a section of the newdevice along the axis of the driving shaft;

Fig. la shows the head of the device in the position of rest;

Figs. 2 and 3 are views of the device as seen from above and from theside; and

Fig. 4 shows the lip of a casting po-t of a typesetting machine.

In the constructional form illustrated, the housing for the millingcutter consists of a boxshaped head I, which is open at the frontfandwhich is fixed upon a tubular handle 9.` This tube contains the drivingspindle 8 driven by means of the hand wheel II, one end of said spindlebeing held in a bearing place of the head I, and the other end in abearing bush I of the tube 9. This spindle carries within the head I` abevel wheel 5. The latter engages a bevel wheel 4 which is exec upon atransverse spindle 1 rotatable in bearing places of the wall of the headI, but nptshiftable. The'spindle 1, the bevel wheel 4, and the millingcutter 3, which is also placed upon the' spindle, together form a fvrigidly connected rotatable aggregate arranged Upon the box of the s Yin the box of the head 'I. head I, which is open at the front, there isplaced a lid-like slide or closure member 2 the front closing wall 2 ofwhich covers the opening in the head I; This slide iS` shiftable by`means of slotsA I in axial I6 upon screw bolts I'I Vof. the headdirection. y f

In the plane of the disc-shaped milling cutter 3 the front wall 2f ofthefslide 2 fis provided with a slot 3 ofsutablefwidth andY length,through which, when tlie slide 2 is pressed down on the head I, themillingcutter will project, as shown` in Fig. 1. In the position of restthis is prevented by two pressing springs 8 arranged in bearing placesin the head I. These springs tend to press the slide into its raisedposition, in which, as will be seen from Fig. la, the milling cutter iscompletely covered by the housing. On both sides of the slot 3 for themilling cutter 3, the slide 2 is provided with two set pins I2, whosepurpose will be explained below.

The operating surface I3' of the lip I3 of the casting pot is providedwith a number of outlet holes or funnels I4, as diagrammaticallyillustrated in Fig. 4; between each pair of these funnels there isarranged in usual manner an air duct I5.

The operation of the new device is as follows:

As soon as it becomes necessary to clear the air ducts I5, thek operatortakes the device by the handle 9 and places the set pins I2 into twoneighboring funnels I4 of the lip of the casting pot. In doing so, themilling cutter 3 is placed exactly upon the air duct to be cleared. Now,the operator causes the milling cutter to rotate by means of thehand-wheel I I, and at the same time presses the front wall 2 of theslide 2 against the operating surface I3' of the lip of the casting pot.Thereby the slide 2 is shifted towards the hand-Wheel I I against thepressure of the springs 6, permitting the milling cutter 3 to graduallyenter the air duct to be cleared. When this is done, the device isplaced upon the next air duct in the manner described above.

What is claimed is:

1. A tool for clearing air ducts in the lip of casting pots oftype-setting machines, comprising a handle member, a milling cuttersupported at one end of said handle member, means providing a housingfor the cutter and said housing being skirt portion and having a closingWall With a carried by the handle member and having a movslottherethrough in alignment with the cutting able Wall with a slottherethrough aligned with edge of said closure member, spring meansnorthe cutting edge of said cutter, drive means for mally forcing saidclosure member outwardly with the cutter extending through the handleand 5 respect to the skirt portion in order to enclose housing, andspring meansnormally maintaining the said cutter, means extendingthrough the said housing sin zafposiition, enclosingfthe= nutten"vhandleintoethe Lhousingqfof: yrotatingsaid shaft vand saidhousingfibeingf.shiitableiagainststhesac- M andi the Isaidcutter,'and=`i'stop means i'carried by tion of said spring means uponengagement with the closing Wall of said closure member and the lip ofthe casting pot for permitting the cutaflOiiadapted to cooperate withthe lip of the casting ting edge of said cutter to extendthroughltheA Apotionlocating,,the...milling cutter and for persaid s lot in order tooperate within'thelipppftthelt mittingginward'm'ovement of the closuremember y casting pot. Whreb'y th'e cutter Will extend through the said2. A tool for clearing air ductsrnx,thenlipnoa;sleteami-.enterrtldeiairiduct to be cleared. casting pots oftype-setting machines;compi'isi-n'ga15 s 4.!A11toolfforeclearing airducts in the lip a handle member, housing means fsuppor'tedby ,v ofcasting potsf..type-setting machines, comthe handle member and includingfixed and-:Jmou-i-'g prisingsafhandle member Carrying spaced alignedable telescoping members, a milling cutter car* bearings, a tooloperating shaft extending ried by the xed housing member and saidlmovef'-v throughsaid bearings, an open-ended skirt porable housingmember,havingaJ slottherethrough 20 tionat.. one ,end ofcsaidihandle, Aa-transversestub aligned withlhe cutting ,edge of -thelisaid cutter, rshaftsjourn'all'ed vLin sadkrt portion,` a,millng., spring meansnormallly forcing :the mdvable nous:ncutterffledtosaidstubsham,intermeshing gearsm. ingjmember outwardlytoapQSiti'on lenclo's'ingthm enA said operating.,shaftiand.said..stub-shaftforze said puttermandesaid:,mQYableighousingi rilember transmitting1o-tation.to...the.,eutter,:a closurebeing;,Shiftablllirlwardlygagainst, the'. action-rofl@ member.telescopingf with@ saidskir't, portion,.,and saidjspring meansuponengagement,With' the lip" slitlablylmounted. thereon with theclosing.v valljof..l 0f ,the Casting pct for 'permitting th'ezcuttingedge; the'4 clesure.. member provided. ,witna slotsa'liened of the saidAcutter'toextendftlniough thesaidSslot with cuttingedg'enf. said cutter,spring,.means, in yorder tozoperate. vvithinjth'e lipof 'the ,c :asti11gnorma1l`y, fo'r`cingsaid.plosureemember outwardly, pot,f.'and `Ydrive`-means for: the cutter ,extending 30 'Wherebygto enclose the'cuttingdgeofthe cutter,

through' th-ehandleand housing ,including a gear;landrlocatingpinscarried b'y..,th'e.closing vvalloi4 transmission inthehousing; saidjclo`sure .membenand adaptedmto cooperate.'r

3. A tool .for clearing nair ducts in ,theli'p'j of With'thej lip of thecasting potioilocatingthe casting pots ofv type=settingmachines,`compris-1 cutterand permittingnnvvard 'movementof ythe inge; handlemember 'having 'an ,open-endedrskirt' 35 saidi'closure members@ ,thatthecuttingedge, of portion at one-end thereoja shaft'journalledin.-thesaidcutter'will'1extend'-through'Qthesaid/slot'gl. said-skirtportion, a' millingicuttenx'ed 'to said andintothe'aiiz'duct'to`becleared.

shaft';a closure'membern slidably mounted on' said j ADOISF'JZUNZER:

